[SignalOne] Color Me Stupid...

[jerry]

Having gotten SSB transmit working, I turned my attention to CW.  By 
voltage measurements, I had found a bad
NPN bipolar transistor that tells the MOSFET audio switch to pass the 
sidetone.

That transistor turned out to be Q7 in....

...can you guess it? ....

...THE RF DRIVER BOARD...

Which I had just reinstalled :).

I *knew* which transistor it was, and I *knew* which board it was on

...But I had forgotten.

OK, let's schlep that board out yet again.

Replaced the transistor with a 2N3904.

Now CW works fine with a hand key.  The keyer is for some reason INOP.  
Even though it used to work.

Well, as I always used to say "Everything works until it stops working". 
  There's a story behind that.
Maybe some other time.

                  - Jerry, KF6VB